Not the most desirable process, but certainly not surprising to see the Italian appeals process overturn the original decision. (The general rate of successful appeals in the Italian system is quite hogh, let alone a case like this.)
“In their verdict today, a panel of three judges headed by Fabrizia Francabandera told the court that only in De Bernardinis’s case could a link be proven between the expert’s words and the actions of some of the victims.”
http://news.sciencemag.org/earth/2014/11/updated-appeals-court-overturns-manslaughter-convictions-six-earthquake-scientists